Carburetor



w. M. oulck CARBURETOR Filed Sept. 23, 1920 2 Sheets-Sheet 1 IN V ENTOR.

Ji l/0?]! 2 v ATTORNEY! I Sept. 22, 1925.

w. M. QUICK 1'554'463 CARBURETOR Filed Sept. 23', 1920 2 Sheets-Sheet 2ill 1 I11 Ill/III INl ENTOR.

HI/)7!!! W ATTORN Patented Sept. 22, 1925.

UNITED STATES WILLIAM H. QUICK, OF HUNTSVILLE, ALABAMA.

GARIBURETOR.

Application flied September 23, 1920. Serial No. 412,140.

To all whom it may concern; I

Be it known that I, WILLIAM M. Qmox, a citizen of the United States,residing at Huntsville, in the county of Madison and State of Alabama,have invented certain new and useful Improvements in Carburetors; and Ido hereby declare the following to be a. full, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it appertains to make and use the same.

This invention relates to internal combus tion engines and moreparticularly to that class in which gasoline is supplied to andvaporized in a carburetor.

The principal object of my invention is to provide for atomizing andmore perfectly vaporizing the gasoline supply and make a more uniformand homogeneous mixture of hydrocarbon vapor and air, so as to obtainperfect combustion and thereby economize in the use of gasoline, or inother words, greatly increase the mileage with a given amount ofgasoline consumed.

Another object is to provide for instantly heating and gasifyinggasoline when starting with a cold carburetor, so as to expeditestarting of a car.

Another object is to provide for mufiling or suppressing the crackingpuffs or noise in the carburetor caused by that part of the exhaustproducts which are returned to the carburetor to atomize and vaporizethe gasoline supply.

The matter constituting my invention will be defined in the claims.

I will now describe the details of construct-ion of my carburetor byreference to the accompanying drawings, in which- Figure 1 represents aside elevation of an engine and my attached carburetor.

Fig. 2 represents a vertical transverse section of the carburetor online 2-2, Fig. 3.

Fig. 3 represents a longitudinal vertical section on line 3-3, Fig. 2.

Fig. 4 represents a section detail of part of an exhaust pipe.

Fig. 5 represents a face View, on enlarged scale, of a throttle valvehaving an electric heater applied thereto, with parts broken awa Fig. 6represents a sectional detail view casting composed of the thick baseplate 1",

the depending casing 1, containing the liq uid' feed regulating tube 5and a closing plug. The base plate 1 is secured by bolts 7, Fig. 3, tothe outer casing. The body 1" fills the transverse area of the outercasing as shown in Fig. 2, and is made with thick walls at its lower endfor containing the atomizing nozzles and passages leading into a mixingchamber 4. Thischamber is shown of triangular form, Fig. 2, in crosssection. The mixing chamber 4: is closed at the top by a guide disc 1 inthe bell shaped piston 21. The upper part of the side walls of the body1 are cut away to provide passages for the bell piston as shown in Fig.2, and is made with shoulders g as bearings for the lower end orextended skirt 21 of the bell piston. The feed tube 5 is provided withexterior rack teeth 6, with which engages a pinion 7, having a crank arm8 for manually raising or lowering the tube with respect to the needlevalve 22. The tube 5 works in a stuffing box a and opens at its lowerend into the hollow plug 9. This plug is perforated and engages by screwthreads with the threaded casing 1 and is provided with a drain cock 9.The casing 1 has perfora.- tions which register with the perforations inthe plug, so that liquid fuel may flow In from a surrounding jacketchamber. The jacket 9 is secured between annular shoulders on casing 1and the hollow plug 9. The float feed device 10 of known constructionconnects by a pipe 11 with the jacket chamber opening by perforationsinto the hollow plug 9.

The atomizing nozzles for liquid and hot products are arranged in thebase of the interior body 1 as shown in Figs. 2 and 6.

The body is provided with ducts a for liquid fuel and ducts d for vapor.Hollow screw plugs 12, each having a perforation c Fig. 6,

are fitted in screw threaded openings inthe base plate 1", so that theirperforations register with the ducts c. The openings for the plugs 12are extended vertically, but of reduced diameter, into the vaporpassages (l, and partially screw-threaded. Into these extended openingsare screwed the jet nozzles 12, preferably so that the tips project intothe ducts d, as shown in Fig. 6. The vapor ducts d are preferablyinclined upward and inward, so that their outlets shall be substantiallyopposite, and provide for discharging streams of vapor into one anotherin the air mixing chamber and thus produce a more intimate andhomogeneous mixture of hydrocarbon vapor and air, and therefore moreperfect combustion in the engine. This efiects economy in the use offuel liquid. In the outer ends of the ducts d are fitted the nozzles 13,the terminals of pipes 13 These pipes are branches of the return pipe13, Figs. 1 and 4, which leads from the exhaust pipe X of engine Wthrough a hollow screw plug a: which is connected by an enlarged openingat its outer end with pipe 13. In plug a: is fitted a muflier nozzlehaving perforations m,

and being of smaller diameter than pipe 13, so as to provide an annularspace I between them. The exhaust gaseous products escape in a diffusedcondition through the perforations, so as to overcome the pulsations ofthe exhaust and cause a uniform flow of gases through the pipes 13, 13to the discharge nozzles 13". This results in complete suppression ofcracking noises in the carburetor.

The usual choke valve 14 is placed in the air inlet 2, and is connectedby a crank arm 15, to which is pivotally connected an operating rod 16.A throttle valve 17 of the butterfly kind is secured by its stem 17 inthe gas outlet pipe 3, adjacent to the mixing chamber. To one face ofthis valve is applied a flat electric resistance coil 18, having acurrent conductor 19 from a battery through the stem 17 and a terminal19 to the ground. The conductors will be suitably insulated. Theresistance coil may be. laid in and covered with a suitable cement 18.When the valve 17 is nearly closed across the pipe 3 its heater will beexposed to the mixing chamber so that gasoline which is sucked into saidchamber in the starting operation will be thrown against the heatedsurface and instantly vaporized and the difficulty of starting anotherwise cold carburetor is overcome. The turning of the valve into thenearly closed position will switch on the current.

A cylinder 20, having a closing cap, rises centrally from the exteriorcasing of the carburetor and serves as a housing and guideway for a bellpiston 21 which operates a needle valve 22 in the liquid fuel supplytube 5. The needle valve 22 is secured at its upper end by a pin a in anadjustable screw-plug 24 in the top of piston 21. A disc 1 at the top ofthe in- .terior carburetor body 1*, Fig. 2, and a sleeve 25, serve asguides for the needle valve, which extends down intothe feed tube 5. Thebell shaped piston works over the interior body 1 down to the shoulderg, Figs. 3 and 6. One side of the cylinder wall may be thickened andprovided with an exhaust or vacuum conduit 26, opening'into the cylinderabove the piston 21 and into draws up piston 21 and the needle valve,

thereby opening the feed tube 5, permitting gasoline to be drawn intothe mixing chamber. This flows or is thrown against the heater 18 andinstantly vaporized and the vapor mixed with air making combustible gaswhich flows to the engine and is ignited. The engine having been startedthe electric current to the heater is out OK, and after this warmexhaust products, flowing through pipes 13 and their nozzles 13 willatomize the gasoline at the jet nozzles 12. This atomized liquiddischarged in opposing streams through the vapor ducts d will cause awhirling motion, by means of which air will be intimately mixed with thevapors to form a homogenenous'mixture which will be wholly burned in theengine.

The bell valve 21 is made heavy enough to fall by gravity, so that theskirt part 21 may rest on the shoulder 9, but yet light enough to bereadily raised by suction when a partial vacuum is created in thecylinder above, due to suction of the engine.

Having described my invention, What I claim and desire to secure byLetters Patent, 1s: Y

1. A carburetor having an exterior casing, an air inlet and a fueloutlet, a mixing chamber in said casing, opposed exhaust gas nozzles insaid mixing chamber, and liquid fuel nozzles adjacent said exhaust gasnozzles, said casing having a depending portion, an adjustable liquidfuel tube in said depending portion, communicating with said liquid fuelnozzles, a needle valve in said adjustable fuel tube and means carriedby said needle valve adapted to be operated by the suction of the motorforopening said valve.

2. A carburetor having an exterior casing, an air inlet and a fueloutlet, a mixing chamber in said casing, opposed exhaust gas rvzzles insaid mixing chamber, and liquid ruel nozzles adjacent said exhaust gasnozzles, said casing having a depending portion, an adjustable liquidfuel tube in said depending portion, communicating with said liquid fuelnozzles, a piston in said exterior casing provided with a dependingflange surrounding said mixing chamber, said casing having a conduitopening at one end above said piston and at the other end in 10 saidfuel outlet, and a needle valve adjustably secured to said piston, andextending through said mixing chamber and into said adjustable liquidfuel tube.

In testimony whereof I aflix my signature.

WILLIAM M. QUICK.

